App Interstitial Mobile Penalty is Live

As of November 2nd, sites blocking a significant amount of content with app install banners (app interstitials) are no longer viewed as mobile-friendly by Google and their rankings will reflect it. This is a shift we've been warning you about for a while now.

So, if you're using an app interstitial then give your site a critical eye from a user's point of view and run it through the mobile-friendly test. You can read the G+ announcement from Google here.